[Frost] [EXTERNAL] Re: Follow up of last FROST meeting

[Stuart Fegan]

Hi Chan,

I'm going to chuck my two cents in, and reply to the FROST list, because 
I missed the meeting last week.  Given the pion is reconstructed from 
the proton missing mass, what's the motivation for looking at proton 
momenta below the threshold where it can reliably reconstructed in CLAS 
as a proton?  Is this to tune the cut, perform systematic studies, or is 
there a physics motivation here that I'm missing?

Cheers,

Stuart

On 23/12/2019 11:47, Michael Dugger wrote:
> Chan,
>
> It is a bit of a data dump.
>
> What is your binning going to by for the analysis? Are you really going to
> report values for E_gamma near 400 MeV?
>
> On slide 3 you show MM^2 and state that MM^2 for p < 280 MeV/c don't look
> like the others. I'm not convinced that you can say much about the MM^2
> shown above p = 280 MeV/c.
>
> For your previous presentation:
>
> https://clasweb.jlab.org/rungroups/g9/wiki/images/9/94/FROST_2019_12_18.pdf
>
> on slide 2 you had a nice fit to the MM^2 distribution where you pulled
> off a pi0 mass. Are you able to do that for the low momentum? Is it
> possible that you can not pull out any pi0 from the low momentum data? I
> just do not see any pi0. Am I missing something?
>
> Take care,
> Michael
>
>>
>>
>> Dear FROST run group,
>>
>> Hello, below is a link to my slides for follow up of last FROST
>> meeting(12/19):
>> https://clasweb.jlab.org/rungroups/g9/wiki/images/e/ed/FROST_2019_12_22.pdf
>>
>> 1. Distributions of kinematics (MMSQ, dt, d\beta) for particles in lower
>> momentum ranges are plotted to see whether lower momentum particles are of
>> any use for my asymmetry calculation.
>>
>> 2. Proton selection, using beta difference, was revised to a simpler
>> version where static cuts on beta diff are applied at +/- 0.06
>>
>>
>> Thank you,
>> Chan
>>
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>
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-- 
Dr Stuart Fegan
Honorary Research Associate
Nuclear Physics Group
University of Glasgow
(Currently at the University of York)

E-mail: s.fegan.glasgow at gmail.com